Timothy M Gordon

US Patent:

20110285518, Nov 24, 2011

Filed:

May 19, 2010

Appl. No.:

12/783233

Inventors:

Timothy J. Gordon - Ann Arbor MI, US
Zeev Bareket - Ann Arbor MI, US
Mark Gilbert - Ann Arbor MI, US
Michael R. Hagan - Ann Arbor MI, US

Assignee:

THE REGENTS OF THE UNIVERSITY OF MICHIGAN - Ann Arbor MI

International Classification:

B60Q 1/00
G01R 23/16
G06F 19/00
G01M 99/00

US Classification:

3404255, 73146, 702 76, 702 77

Abstract:

A method and system for detecting the existence of rumble strips on a roadway by a vehicle. Wheel speed data is obtained from a wheel speed sensor, and frequency-based analysis is then performed on the wheel speed data. The presence of a rumble strip can then be detected based on the outcome of the frequency-based analysis. The wheel speed data can be modified before conversion to the frequency domain to reduce wheel-induced cyclic variations in wheel speed. The frequency-based analysis can use an FFT and a peak detection method that analyzes one or more peaks in the FFT data to determine if any are indicative of the presence of a rumble strip. The method can be carried out automatically in real time and used to alert the driver of the detection of the rumble strip.